Refacing tool for crankshaft journals



E. A. VESTER I REFACING TOOL FOR CRANKSHAFT JOURNALS' Filed April 22, 1944 2 Sheets-Sheet l flaws T film/a: Y V25 722a,

Aug. 28, 1945. v E. A. VESTER REFACING TOOL FOR CRANKSHAFT JOURNALS Filed April 22, 1944 2 Sheets-Sheet 2 Q n A \Y m E7 n R H. w m E I blade,

Patented Aug. 28, 1945 YA EN OFFICE- REFAiCI NG Tool. FOR CRANKSHAFT 7 JOURNALS Ernest Aubrey Vester, Danville, Ill., assignor of one-fourth to Harry W. Reuther, Danville, Ill.

Application April 22, 1944, Serial No. 532,303

2' Claims.

My invention relatesto improvements in refacing tools for use in. reconditioning the main journals of crankshafts of automobile engines.

The invention is designed. with the primary object in view of providing a simply constructed,

easily operated device of few partsadapted for resurfacing the main journals of automobile engine crankshafts and turning the same down to a new size, all without removing the crankshaft from the engine, and which is easy to apply, may be finely adjusted and manufactured for the trade at a comparatively low 'cost as a garage or kit tool.

Other and subordinate objects are also comprehended by my invention, all of which, together with the precise nature of my improvements, will be readily understood when thesucceeding description and claims are read with reference to the drawings accompanying andforming part of this specification.

I said drawings:

Figure 1 is a view in bottom plan of my inf-7 proved refacing tool,

Figure 2 is a view in longitudinal section illustrating the tool applied,

Figure 3 is a view in transverse section taken on the line 3-3 of Figure 1,

Figure 4 is a view in perspective of the cutting Figure 5 is a disassembled view in perspective of the guide plate and the guide bars at one side of the plate.

Referring to the drawings by numerals, my

improved refacing tool, in the preferred embodiment illustrated, comprises, as its basic element, a flat guide plate I of elongated rectangular form, of ,any suitable metal, provided at what constitutes the front end thereof with an upstanding edge lip 2 extending across the plate and'for a purpose to be explained.

An elongated, rectangular, plate-like, cutting blade holder 3 is slidably opposed to the bottom face of the guide plate I for endwise adjustment forwardly and rearwardly thereof. The blade holder 3 is provided with a thickened front end portion 4 for reinforcing purposes, a transversely rounded front end 5 provided with an upwardly and forwardly inclined square slot 6 extending from side to side of said holder, 3, pair of longitudinall extending slots 1 in the portion 4 adjacent opposite sides of the holder 3, and a pair of similar slots 8 in its longitudinal center and in the rear of the portion 4 suitably spaced apart longitudinally of the holder for a purpose presently apparent.

the holder to the guide plate I in different set positions of said holder. The studs 9 are pro vided with rivet head shanks I2 by means of which said studs are secured in the guide plate I, and below the nuts ID, with eye-forming ends I3 presently again referred to.

A pair of. front guide bars I4 secured to opposite sides. of the guide plate I, by screws I5, to overlap the sides of the blade holder 3, guide said. holder 3 at its front end and prevent side play of said holder during adjustment of the latter.: A second pair of longer guide bars I6 secured to opposite sides of the guide plate I in the same manner as the guide bars I4 in the rear of ;the'bars I.4 guide the blade holder 3 additionally, intermediate its ends, when said holder is being adjusted.

For adjusting the blade holder 3, an adjusting shaft I1 is provided beneath said holder with a rear end portion thereof rotatably mounted in a suitable bracket I8 depending from the rear end of said holder 3 and secured thereto, as by screws I9, said shaft I 1 being restrained against endwise movement in the bracket I8 by means of a pair ofcollars 20 fixed on said shaft by pins 2| upon opposite sides of said bracket I8. The front end portion of the adjusting shaft I! is rotatably and slidably mounted in a bushing 22 fitted in'the eye-forming end I3 of the foremost stud 9 and retained in said end by end flanges 23 on the bushing, A portion of the adjusting shaft I1 in the rear of the bracket I8 is formed with a wrench hold 24 and an intermediate portion 25 of said shaft is threaded in the eye-forming end I3 of the rear stud9. Thus, as will be seen, by applying a wrench, or other tool, to the wrench hold 24, the nuts It being loosened, the adjusting shaft I! may be rotated in opposite directions to feed the same forwardly or rearwardly in the end I3 of the stud 9 and thereby correspondingly ad just the blade holder 3 at will..

A suitable cutting blade 26 for turning down a main crankshaft bearing is secured in the slot 6 to extend out of the same with an upward and forward inclination, by means of set screws 21 extending obliquely upwardly in the front end 5 of the blade holder 3'. As will be understood, the blade 26 is designed to extend along the entire length of the main bearing and is provided with a suitable cutting edge 28 extending throughout the length of said blade.

Referring now to the use and operation of the invention, after the lower bearingcap section, not shown, of the main journal to be refaced has been detached, the described tool is attached at its front end to the bottom face of the usual web 29 for the main bearing, at one side of the main journal 30 and by means of a pair of the usual stud bolts 3| for the cap bearing section. For this purpose, the guide plate I is provided adjacent its front end with a pair of suitably spaced stud-receiving openings 32 aligned with theslots 1 and said plate with the studs 3| extending a through the openings 32 and said slots 1 is clamped against the web 29 by means of the usual castellated nuts 33 on said studs 3!; Thelip 2 is inserted in the bearing seator opening 35 against the usual upper liner section 34 to prevent said liner section from creeping around during the refacing operation. In the described application, of the tool, the cutting blade 26 may be adjusted against the main journal 30, as occasion may require, by loosening the nuts 33 and H! operating the adjusting shaft ll in the manner already described, and clamping the blade holder ,3 in selected adjusted position by means of said nuts. As will be understood, the refacing is accomplished by driving the crankshaft, not shown, so that the main journal is revolved slowly against the cutting edge 28 of the cutting blade 26.

"As will now be manifest, the tool of my invention provides for refacing main journals without removing the crankshaft and in applying and operating the tool it is merely necessary to detach the usual an from the engine and the lower cap journal section, not shown, of the main journal to be refaced and turned down. Thus, substan: tially all of the many operations heretofore necessary as preliminary to refacing main journals are eliminated, such, for instance, as taking the engine out of the automobile, the crankshaft out of the motor, replacing pistonrings, et cetera,

' front end provided with a cutting blade mounted therein for positioning against a journal, means to attach said plate to the bottom face of the bearing Web of a journal to be refaced, means to mount said holder on said plate for adjustment into different set positions to variably position said blade relative to said journal, and means to adjust said holder, said guide plate having a right angled'edge lip for positioning in the bearing seat to prevent a bearing liner from in-' terfering with said blade.

2. A tool for refac'ing and turning down shaft journals of automobile engines comprising a guide plate, a blade holder of plate-like form having a front end provided with a cutting blade mounted therein for positionin against a journal, means to attach said plate to the bottom face of the journal web of a journal to be refaced, means to mount said holder on said plate for adjustment into difierent set positions to variably position said blade relative to said journal, and means to ad: just said holder, the mean last mentioned comprising studs depending from said plate, said holder having slots therein through which the studs extend, and an adjusting shaft rotatably mounted on said holder, said shaft being threaded through one stud and slidably and rotatably mounted in another stud. 1

ERNEST AUBREY VESTER. 

